drop table if exists t1,t2;
drop view if exists v1,v2;
drop function if exists f1;
drop function if exists f2;
use INFORMATION_SCHEMA;
show tables;
Tables_in_information_schema
CHARACTER_SETS
COLLATIONS
COLLATION_CHARACTER_SET_APPLICABILITY
COLUMNS
COLUMN_PRIVILEGES
KEY_COLUMN_USAGE
ROUTINES
SCHEMATA
SCHEMA_PRIVILEGES
STATISTICS
TABLES
TABLE_CONSTRAINTS
TABLE_PRIVILEGES
TRIGGERS
USER_PRIVILEGES
VIEWS
show tables from INFORMATION_SCHEMA like 'T%';
Tables_in_information_schema (T%)
TABLES
TABLE_CONSTRAINTS
TABLE_PRIVILEGES
TRIGGERS
create database `inf%`;
create database mbase;
use `inf%`;
show tables;
Tables_in_inf%
grant all privileges on `inf%`.* to 'mysqltest_1'@'localhost';
grant all privileges on `mbase`.* to 'mysqltest_1'@'localhost';
create table t1 (f1 int);
create function func1(curr_int int) returns int
begin
declare ret_val int;
select max(f1) from t1 into ret_val;
return ret_val;
end|
create view v1 as select f1 from t1 where f1 = func1(f1);
create function func2() returns int return 1;
use mbase;
create procedure p1 ()
begin
select table_name from information_schema.key_column_usage
order by table_name;
end|
create table t1 
(f1 int(10) unsigned not null,
f2 varchar(100) not null,
primary key (f1), unique key (f2));
select * from information_schema.tables;
call mbase.p1();
call mbase.p1();
call mbase.p1();
use `inf%`;
drop user mysqltest_1@localhost;
drop table t1;
select table_name, table_type, table_comment from information_schema.tables
where table_schema='inf%' and func2();
table_name	table_type	table_comment
v1	VIEW	View 'inf%.v1' references invalid table(s) or column(s) or function(s) or define
select table_name, table_type, table_comment from information_schema.tables
where table_schema='inf%' and func2();
table_name	table_type	table_comment
v1	VIEW	View 'inf%.v1' references invalid table(s) or column(s) or function(s) or define
drop view v1;
drop function func1;
drop function func2;
drop database `inf%`;
drop procedure mbase.p1;
drop database mbase;
use test;
create table t1 (i int);
create function f1 () returns int return (select max(i) from t1);
create view v1 as select f1();
create table t2 (id int);
create function f2 () returns int return (select max(i) from t2);
create view v2 as select f2();
drop table t2;
select table_name, table_type, table_comment from information_schema.tables
where table_schema='test';
table_name	table_type	table_comment
t1	BASE TABLE	
v1	VIEW	VIEW
v2	VIEW	View 'test.v2' references invalid table(s) or column(s) or function(s) or define
drop table t1;
select table_name, table_type, table_comment from information_schema.tables
where table_schema='test';
table_name	table_type	table_comment
v1	VIEW	View 'test.v1' references invalid table(s) or column(s) or function(s) or define
v2	VIEW	View 'test.v2' references invalid table(s) or column(s) or function(s) or define
drop function f1;
drop function f2;
drop view v1, v2;
create database testdb_1;
create user testdb_1@localhost;
grant all on testdb_1.* to testdb_1@localhost with grant option;
create user testdb_2@localhost;
grant all on test.* to testdb_2@localhost with grant option;
use testdb_1;
create table t1 (f1 char(4));
create view v1 as select f1 from t1;
grant insert on v1 to testdb_2@localhost;
create table t3 (f1 char(4), f2 char(4));
create view v3 as select f1,f2 from t3;
grant insert(f1), insert(f2) on v3 to testdb_2@localhost;
create view v2 as select f1 from testdb_1.v1;
create view v4 as select f1,f2 from testdb_1.v3;
revoke insert(f1) on v3 from testdb_2@localhost;
show create view v4;
ERROR HY000: EXPLAIN/SHOW can not be issued; lacking privileges for underlying table
show fields from v4;
ERROR HY000: EXPLAIN/SHOW can not be issued; lacking privileges for underlying table
show fields from v2;
Field	Type	Null	Key	Default	Extra
f1	char(4)	YES		NULL	
show fields from testdb_1.v1;
Field	Type	Null	Key	Default	Extra
f1	char(4)	YES		NULL	
show create view v2;
View	Create View
v2	CREATE ALGORITHM=UNDEFINED DEFINER=`testdb_2`@`localhost` SQL SECURITY DEFINER VIEW `test`.`v2` AS select `v1`.`f1` AS `f1` from `testdb_1`.`v1`
show create view testdb_1.v1;
ERROR 42000: SHOW VIEW command denied to user 'testdb_2'@'localhost' for table 'v1'
select table_name from information_schema.columns a 
where a.table_name = 'v2';
table_name
v2
select view_definition from information_schema.views a 
where a.table_name = 'v2';
view_definition
/* ALGORITHM=UNDEFINED */ select `v1`.`f1` AS `f1` from `testdb_1`.`v1`
select view_definition from information_schema.views a 
where a.table_name = 'testdb_1.v1';
view_definition
select * from v2;
ERROR HY000: View 'test.v2' references invalid table(s) or column(s) or function(s) or definer/invoker of view lack rights to use them
drop view testdb_1.v1,v2, testdb_1.v3, v4;
drop database testdb_1;
drop user testdb_1@localhost;
drop user testdb_2@localhost;